looking for recs to source a low cost, high speed motor for a 20 inch wheel. more details within

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Nov 14, 2023
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New York City
I have a 700c/28" dog of a cheap schwinn that I bought used with a (purportedly 1500w) direct drive motor running at 52v (4p battery. hailong style. this thing is fast. faster than I want to take it with how the bike is set up.

I finally took out this 250w 20 inch geared motor and the motor is only good for below 10 mph- the opposite of what I want the motor for. it feels like I'm working against the motor when I pedal over 10 or so mph. by the way, I only use throttle to modulate motor assistance. PAS is unnatural and dangerous feeling to me. Ive ordered a kt controller so I can mess with the parameters, in addition to seeing if the motor can handle 48v which I might try tonight.
I've been contemplating getting a DD front hub (there are MANY with cast wheels for under 200 on ebay. 420 rpm no load reported on the not too reliable page.). although i could be convinced to stay with rwd.

however, Im getting close to the cost of a bafang bbs02, which if I understand correctly is easier to switch between bikes since there's no wheel lacing involved.
I've never ridden a mid drive. utilizing the gearing, one should be able to get rather high top end speeds right? this is all for fast shots on flat ground.

can you suggest certain motors that I might want to look at (and where I might be able to source them china-cheaply)?

ive also got two single speed sprocket geared e bike hubs (36 and 52v, surplus from a bike share), and two scooter hub motors (350w at 36v and 500+ at 48v). wish I could figure something to do with those. maybe one of those odd friction drives, although the mechanical and mounts would likely be a pain.

speaking of likely to be a pain- re-winding a motor for a faster turn count is also probably not the most useful way to spend my time right? how many people do that and are happy with the results.
 
I have a 700c/28" dog of a cheap schwinn that I bought used with a (purportedly 1500w) direct drive motor running at 52v (4p battery. hailong style. this thing is fast. faster than I want to take it with how the bike is set up.
You could just back of the speed a little !
 
You could just back of the speed a little !
eh. contradicts the purpose of it's use. I use the bike in lower manhattan and when I look at my google maps timeline it thinks I'm using a motorcycle.
I really hate the bike that I have the motor on... it's the cheapest schwinn.
I also really dislike installing/removing the wheel from the frame... the disk brake, derailleur and reduced clearance/increased weight from the DD hub makes it a real pain in the ass.
 
Less volts, adjust controller output, run the tires with lower psi, put a stop on your throttle, disconnect the hall sensors, it will start off funky but it usually won't go as fast either. Those are just the first things that came to mind
 
I have a 700c/28" dog of a cheap schwinn that I bought used with a (purportedly 1500w) direct drive motor running at 52v (4p battery. hailong style. this thing is fast. faster than I want to take it with how the bike is set up.

I finally took out this 250w 20 inch geared motor and the motor is only good for below 10 mph- the opposite of what I want the motor for. it feels like I'm working against the motor when I pedal over 10 or so mph. by the way, I only use throttle to modulate motor assistance. PAS is unnatural and dangerous feeling to me. Ive ordered a kt controller so I can mess with the parameters, in addition to seeing if the motor can handle 48v which I might try tonight.
I've been contemplating getting a DD front hub (there are MANY with cast wheels for under 200 on ebay. 420 rpm no load reported on the not too reliable page.). although i could be convinced to stay with rwd.

however, Im getting close to the cost of a bafang bbs02, which if I understand correctly is easier to switch between bikes since there's no wheel lacing involved.
I've never ridden a mid drive. utilizing the gearing, one should be able to get rather high top end speeds right? this is all for fast shots on flat ground.

can you suggest certain motors that I might want to look at (and where I might be able to source them china-cheaply)?

ive also got two single speed sprocket geared e bike hubs (36 and 52v, surplus from a bike share), and two scooter hub motors (350w at 36v and 500+ at 48v). wish I could figure something to do with those. maybe one of those odd friction drives, although the mechanical and mounts would likely be a pain.

This is an extremely long question, can you state it a lot more simply?

Are you trying to put a 20 inch wheel on a bike with 700c?

speaking of likely to be a pain- re-winding a motor for a faster turn count is also probably not the most useful way to spend my time right? how many people do that and are happy with the results.

Even the Chinese are using machines to do this winding instead of doing it by hand, a good hint that the process is a huge pain in the ass.

I would, 100% of the time, prefer to order a motor with an appropriate winding for the torque/top speed you're looking for.
Companies i know if that will sell differing windings:
- leafbike - sells a huge range of windings
- ebikes.ca aka grin technologies, usually offers 2-3 winding choices per motor
 
Take the motor and parts to a different frame, no need to rewind or call it quits. The throttle can be pulsed. Sounds like a decent kit on a sloppy setup.
 
I have purchased a 20" wheel DD motor on Walmart.com for $200, it's a mag rim,
1000w
 
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